来源：ACS PublicationsThe popular Er3+–Yb3+ upconversion (UC) system generates green and red emissions under near-infrared (NIR) 980 nm excitation. The green emission is a two-photon process, whereas for the red emission two and three photon process are both possible, depending on host. Fluoride hosts generally favor a three-photon process because fluorides have low phonon energies and multiphonon relaxation (MPR) involved in the usual two-photon process is suppressed. However, CaF2:Er3+/Yb3+ exceptionally produces an intense two-photon upconverted red emission. Here, we show that the red UC emis...
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2026
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来源：ACS PublicationsReactions between carbon and lithium hydride in a mixed metal europium/lithium flux led to the synthesis of Eu2Li(C3)H. At room temperature, the compound crystallizes in the tetragonal space group P4/mbm (no. 127, Z = 2; Ca2Li(C3)H type) and undergoes a second-order structural phase transition below ∼250 K to an orthorhombic low-temperature modification (no. 55, Pbam; Z = 4), crystallizing in a new structure type. The phase transition was monitored by using single-crystal X-ray diffraction (SCXRD) and temperature-dependent high-resolution powder diffraction data. Infrared (I...
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2026
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来源：ACS PublicationsThe binding of rare earth elements to extractants is a key step in their separation and purification by solvent extraction. Classical MD simulations are used to investigate the equilibration configuration and binding dynamics of one, two, and three DEHP– to Er3+ in both bulk water and at the water–dodecane interface. The equilibrium radial distribution function g(r) shows that Er–O and Er–P radial separations within the first and second hydration shells are essentially identical for all bulk and interface simulations, though other aspects of the spatial configuration of hete...
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2026
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来源：ACS PublicationsBisphenol A (BPA) poses significant risks to human health and ecosystems due to its severe adverse effects. Consequently, effective BPA removal from water sources is imperative. While naturally occurring laccase (Lac) can degrade BPA, its widespread use is limited by high costs and instability. Nanozymes, with their superior catalytic activity and robust properties, offer a viable alternative. Herein, we synthesized a novel layered nanozyme by incorporating rare-earth metals (La, Gd, Dy, Er) with copper. The La-based material demonstrated the highest laccase-like activity. C...
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2026
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